LEE, S. I., LI, T. S., & KIM, I. H. (2016). Dietary supplementation of delta-aminolevulinic acid to lactating sows improves growth performance and concentration of iron and hemoglobin of suckling piglets. The Indian Journal of Animal Sciences, 86(7), 781–785. https://doi.org/10.56093/ijans.v86i7.59923